Forget Dropper Posts, Black Math Bike Created a Dropper Frame

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Every now and then a press release comes along that makes us do a double (or triple) take. That’s the case with this ad from Black Math Bikes. The Polish company has apparently created a bike with a handlebar-mounted remote that turns it from a 140mm trail bike into a 170mm descending machine. There is no traditional dropper post – instead, the top tube moves to get out of the way for the downswing.

It’s certainly unlike anything currently on the market – read on for Black Math’s description of its creation.– Mike Kazimer

GCode is a 2 in 1 MTB framework. Simple as that

PRESS RELEASE: Black Math Bikes

Writing this is really unreal, but I have just fulfilled my childhood dream of running my own bike company. When I signed up for this Pinkbike account, I was a typical dirt-hopping Eastern European guy, who loved the thrill of riding sketchy jumps all over Poland, making friends along the way and drawing my first bicycles. Long story, we are 15 years later, I did a degree in design and worked on many bikes for different companies and a few for myself, but two years ago I started a project – Black Math. Together with a few friends from the dirt jumping period, we joined together, raised funds from the EU startups program and here we are with a GCode – a bicycle frame that will turn heads on the track! This project sat in my head for too long, and after riding it, I can say once more: that my dream has come true! Designed and produced in Poland, it goes far beyond my imagination and does not look like a Session. Let’s go!—Alexander Margolis

Black Math Bike is a bunch of geeks with deep roots in the bike industry. We are passionate about reimagining bicycles for a better future. Black Math Bikes focuses on innovation, sustainability and quality in our low-key approach to cycling improvement.

Introducing the precisely crafted kinematic system that allows you to change your bike from an efficient 140mm travel bike to a racing 170mm travel weapon.

How does it work?

The Upturn Dropper is controlled with a regular thumb operated lever. However, instead of a classic telescopic post, it uses a set of links located at the end of the upper tube, creating a virtual pivot point system.

This allowed us to precisely design the movement of the seat, including the change of angle. But the real magic started when we integrated the seat adjustment kinematics with the four-bar Horst Link suspension. Now, we can adjust the geometry and performance of the suspension through the change of seat position.

Lowering the seat puts the whole bike into descent mode – the head angle gets slacker, the pedal pedal drops, and the suspension reaches 170mm of travel with a 33% rate of progression. Elevating the seat transitions in climb mode – steeper head angle, higher bottom pedal (and height), and reduced suspension travel to 140mm. Shorter travel with the same shock setup results in less sag and a firmer suspension feel, providing stable support during intense pedaling. It’s like combining the benefits of Aenomaly Switchgrade, Flip-chip and Climb-switch, but without any extra effort. Use the dropper as always and enjoy a bike that offers unparalleled possibilities!

The frame opens and closes on the separate gas chamber hidden under our fabric prototype

Meet the GCode framework:

GCode – a standardized language for recording commands for CNC devices. The name of the bike pays homage to the contemporary craftsmanship of the 21st century, indicating our dedication to technical perfection, precision and the highest quality.

Key features:

We start shipping pre-orders at the start of the 2024 season, but first of all, we want to triple check everything to make you smile while unpacking the box!

bigquotes At BlackMathBikes, we are more than just a niche MTB business. We are passionate local pilots pushing the boundaries of innovation. With our “GCode” Frame, we challenge the industry to rethink what a mountain bike can be. We believe in critical innovation to create a better riding experience—Alexander

Why CNC?

Due to the adjustment of the geometry of the frame, it consists of smaller parts connected with bearings and screws. This type of design is suitable for low volume production with CNC machines.

It offers several advantages:

Technique:
Ultimate overall accuracy.
We can use non-weldable 7075 alloys, almost twice as strong as those used for welded aluminum frames.
We can precisely manage the compliance of building structures. Downtube uses adhesive joints to improve torsional stiffness of the front end.

Quality:
By eliminating manual technological processes, we reduce the possibility of errors caused by human factors. This reduces the risk of quality problems.
In-house production gives us control over every aspect of production.
Environmental:
The frame divided into smaller components reduces the consumption of large aluminum blocks compared to other CNC technology frame manufacturers.
We produce locally, in Poland.
We use highly recyclable materials.
Dividing the frame into smaller components facilitates repair after damage.
We can ensure the availability of spare parts.

For a deeper dive into our mind and offering – please jump into our website or follow us on social media for monthly updates! We’re all ears for you, so don’t hesitate to contact Black Math Bikes!

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